Internal-combustion engine



July 7, 1925.

W. LAWRENCE INTERNAL COMBUSTION ENGINE Filed June-l1, 1923 Zig. Z.

the full stroke of the piston.

al I Patented .hay 7,1925. y

UNlrEo STATES.

WATERBURYEWRENCEQOE WHITE PLAINS, NEw Your.

INTERNAL-COMBUSTION ENGINE Application le'd Junev 1 1, 1923. Serial No. 6445767.`

The head. 3 ,wfor each To all 'wlw/m` con-cem: .I

Bef'it known that I, WATERBURY .LAW- nENoE, a citizen of'the United States, and

a resident of White Plains, in the 'county` of Westchester and State of` New York,

` I have invented a new and ImprovedInternaL Y Combustion Engine, of which the following -is a full, clear, and. exact. description.

-This invention relates to internal combustion engines and particularly -to an improved valve structure and has for an object to provide "an ,engine in which a rotary valve is provided for each cylinder presenting a maximum openingfor both the intake I' and exhaust. A

Another object of the invention is to provielen-'rotary valve structure for an infernal combustionl engine ,in which a conically shaped valve is used and held in place in such a manner as `to readily -operate at all d expansion or action; a,

VAn Yadditional object `is to provide 1n an internal combustione' engine a rotary valve structure which will remain open at thev intake and exhaust strokes for substantially A'further object is to pr wherein the valve will hold a maximum compression during the lifefof the engine without independent grinding or marnial adjustment.

In .the accom anying drawing- Figurells a' ongitudinal vertical section through an engine with a valve structure j disclosing vanuembodiment oi the invention. Fi re 2 is a side-view of the valve membe i? own in .Figure 1. Figures 3', 4, 'and 6 disclose diagrams i illustrating the vai-lons "positions of the various ports during-one `revolution of the valve member shown 1n Figure 2. Figure v'7 1s a discloslng a'modified lformof engine cylinder to that illustrated ,in Figure 1.

Figure '8 isa fragmentary sectional view through the valve stem supporting means 4 shown in Figure 1.y

Referring to the accompanying drawing4 by numerals, 1 indicates the .usual crank cas'in which is associated with a cylinder 2, said cylinderl being provided with a cylinder head 3, which head has been shown integral though if desired, it could be made separate any desired manner.

land associated parts shown ovide a structure of the and therebytends to move -the valve up-v p 1 permitting a free fragmentary sectional view and vbolted, to the cylinder 2 in.

cylinder' tapers upwardly andmerges into a tubular outlet .f1 accommodating the 'stem v5 of the valve member 6, which valve member is cone-shaped and open at the bottom.

A single port-7 is arranged in the valve member 6 and preferably extends from near the to topnear the bottom. The stem 5 is provi ed preferably with a squaredpart 8 anda squared part 9 accommodating thel squared parts of sleeve22, which sleeve coacts with bearing" members 10 and 11 mounted in suitable extensions 12 and 13 projecting from the bracket or frame 14 which is secured inf-any desired manner to the head 3. The` extension 12 also carries a rotatable shaft 15 connected at one-end with the sprocket wheel 16, which sprdcket wheel accommodates the chain 17, said chain extending downwardly and over sprocket wheel 18 secured to the crank shaft The shaftl carries a worm 20'for each' cylinder, there being onl one cylinder ut it will be evident thatany desired number might be used without departing from the spirit of the invention.l

The worm 20 continually meshes with the wormgear 21 rigidly secured by a key 21' or may be formed integral'with the sleeve 22. v This sleeve, as shown in Figure 8, is formed vwith a squared portion at the top fit. The sleeve22 is formed with a slot 23 through which pin 24: extends, said pin' being fixed rigidly in the stem 5. This pin acts as a stop for the spring 25, which spring continually acts `against the'hub 24C gear wheel 21 and against the pin 24 ,wardly and hold it tightlyto its/seat while ciprocatory movement of the stem 5 is'very small as this movement is permitted merely to take care of the expansion and contraction of the valve member 6 as it operates.

The head 3 which receives the valve member 6 is provided with an intake port 26 and an exhaust port 27. c-aot with theport 7 ofthe valve member 6 during the operation of the engine. `In Figures 3 to 6 inclusive, diagrams have been shown illustrating the position of the ports at the end of the respective strokes. In Figure 3, the ports are shown atthe end of the rotation thereon The re-l f Both of these lports the intake stroke, Figure 4 at'A the end of the compression stroke,-Figure 5 at the end of .the explosion stroke and Figure 6 at the as permits the spark plug 28 to functionat can be varied to This spark plug is preferably positioned approximately 120 from the center of the intake port 26 so that it Will be uncovered at the proper time to ignite the compressed gases. The port 7 is sufiiciently Wide' lto permit the spark to be advanced or retarded in the usual manner. The timing of the valve is controlled by the location andwidth of the ports in the valve andthe cylinder head. It is also evident that the Valve may be lubricated by oil holes and grooves or in any other desired manner whereby there will be an ecient operation of the respective parts. It is also evident thatkthe position of the spark plug accommodate the arrangement of the ignition timing.

In Figure 7 a slightly modified construction is disclosed in which a by-pass or side the proper time.

opening 29 is provided in the head 3 Which accommodates the plug 28. This arrangement of spark plug is'desirable Where a spark is to be advanced or retarded greatly, though ordinarily the arrangement disclosed in Figures 3 to 6 is preferable.

In an internal combustion engine, a cylinder provided with a head having a coneshaped compression chamber, said head being formed With intake and exhaust ports with their centers approximately ninet)T degrees apart, a'cone-shaped valve member fitted into said compression chamber and provided with a single port coacting with said intake and exhaust ports, a stem extending from said valve member to a point exteriorly of` the cylinder, a sleeve loosely mounted on said stem, said slee/ve having a slot at one point, a pin extending through said slot. a spring acting on said pin for urging the same in such a direction asto maintain said valve formed with squared portions and said sleeve being formed With a square bore fittingsaid squared portions, means for driv ing said sleeve whereby said valve will be rotated, and'a spark plug carried by said head approximately half Way between the intake and exhaust ports.

WATERBURY LAWRENCE.

seated, said stem being. 

